A medical X-ray or imaging scan of the gallbladder, usually taken after injecting dye to make the organ visible.
From Greek 'chole' (bile) + 'kystis' (bladder) + 'gramma' (written record or image). '-gram' suffix indicates a recorded image or scan.
Before ultrasound became standard, cholecystograms using radioactive dye were how doctors diagnosed gallstone disease—it's a pre-digital imaging technique that shows how medical technology constantly evolves.
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